<div class="refentry" lang="en" xml:lang="en"><a id="gluTessEndPolygon"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>gluTessEndPolygon — delimit a polygon description</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">gluTessEndPolygon</b>(</code></td><td>GLUtesselator*  </td><td><var class="pdparam">tess</var><code>)</code>;</td></tr></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>tess</code></em></span></dt><dd><p>
                    Specifies the tessellation object (created with <a class="citerefentry" href="gluNewTess"><span class="citerefentry"><span class="refentrytitle">gluNewTess</span></span></a>).
                </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>
            <a class="citerefentry" href="gluTessBeginPolygon"><span class="citerefentry"><span class="refentrytitle">gluTessBeginPolygon</span></span></a> and <code class="function">gluTessEndPolygon</code> delimit the
            definition of a convex, concave, or self-intersecting polygon. Within
            each <a class="citerefentry" href="gluTessBeginPolygon"><span class="citerefentry"><span class="refentrytitle">gluTessBeginPolygon</span></span></a>/<code class="function">gluTessEndPolygon</code> pair, there must be
            one or more calls to <a class="citerefentry" href="gluTessBeginContour"><span class="citerefentry"><span class="refentrytitle">gluTessBeginContour</span></span></a>/<a class="citerefentry" href="gluTessEndContour"><span class="citerefentry"><span class="refentrytitle">gluTessEndContour</span></span></a>.
            Within each contour, there are zero or more calls to <a class="citerefentry" href="gluTessVertex"><span class="citerefentry"><span class="refentrytitle">gluTessVertex</span></span></a>.
            The vertices specify a closed contour (the last vertex of each contour
            is automatically linked to the first). See the <a class="citerefentry" href="gluTessVertex"><span class="citerefentry"><span class="refentrytitle">gluTessVertex</span></span></a>,
            <a class="citerefentry" href="gluTessBeginContour"><span class="citerefentry"><span class="refentrytitle">gluTessBeginContour</span></span></a>, and <a class="citerefentry" href="gluTessEndContour"><span class="citerefentry"><span class="refentrytitle">gluTessEndContour</span></span></a> reference pages for
            more details.
        </p><p>
            Once <code class="function">gluTessEndPolygon</code> is called, the polygon is tessellated, and the
            resulting triangles are described through callbacks.
            See <a class="citerefentry" href="gluTessCallback"><span class="citerefentry"><span class="refentrytitle">gluTessCallback</span></span></a> for descriptions of the callback functions.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="example"></a><h2>Example</h2><p>
            A quadrilateral with a triangular hole in it can be described like this:
            </p><pre class="programlisting">
gluTessBeginPolygon(tobj, NULL);
   gluTessBeginContour(tobj);
      gluTessVertex(tobj, v1, v1);
      gluTessVertex(tobj, v2, v2);
      gluTessVertex(tobj, v3, v3);
      gluTessVertex(tobj, v4, v4);
   gluTessEndContour(tobj);
   gluTessBeginContour(tobj);
      gluTessVertex(tobj, v5, v5);
      gluTessVertex(tobj, v6, v6);
      gluTessVertex(tobj, v7, v7);
   gluTessEndContour(tobj);
gluTessEndPolygon(tobj);
            </pre><p>
            In the above example the pointers,
            <math overflow="scroll"><mi mathvariant="italic">v1</mi></math>
            through
            <math overflow="scroll"><mi mathvariant="italic">v7</mi></math>,
            should point to different
            addresses,
            since the values stored at these addresses will not be read by
            the tesselator until <code class="function">gluTessEndPolygon</code> is called.
        </p></div>
        {$pipelinestall}{$examples}
        <div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
            <a class="citerefentry" href="gluNewTess"><span class="citerefentry"><span class="refentrytitle">gluNewTess</span></span></a>,
            <a class="citerefentry" href="gluTessBeginContour"><span class="citerefentry"><span class="refentrytitle">gluTessBeginContour</span></span></a>,
            <a class="citerefentry" href="gluTessBeginPolygon"><span class="citerefentry"><span class="refentrytitle">gluTessBeginPolygon</span></span></a>,
            <a class="citerefentry" href="gluTessCallback"><span class="citerefentry"><span class="refentrytitle">gluTessCallback</span></span></a>,
            <a class="citerefentry" href="gluTessNormal"><span class="citerefentry"><span class="refentrytitle">gluTessNormal</span></span></a>,
            <a class="citerefentry" href="gluTessProperty"><span class="citerefentry"><span class="refentrytitle">gluTessProperty</span></span></a>,
            <a class="citerefentry" href="gluTessVertex"><span class="citerefentry"><span class="refentrytitle">gluTessVertex</span></span></a>
        </p></div><div class="refsect1" lang="en" xml:lang="en"><div id="Copyright"><h2>Copyright</h2><p>
            Copyright © 1991-2006
            Silicon Graphics, Inc. This document is licensed under the SGI
            Free Software B License. For details, see
            <a class="ulink" href="https://web.archive.org/web/20171022161616/http://oss.sgi.com/projects/FreeB/" target="_top">https://web.archive.org/web/20171022161616/http://oss.sgi.com/projects/FreeB/</a>.
        </p></div></div></div>
